Weapon

A weapon is used by the player to attack opponents. It is displayed onscreen as part of the body of the player character to simulate a first person perspective. In Doom it is the main aspect of the game action.

Each appears in the form of an item that, when picked up, provides the player with an additional weapon with which to attack opponents, as well as a bit of ammo for the corresponding weapon. Normally weapons are either placed in levels by the designers or dropped by dying opponents (such as zombies in the Doom games). Once a weapon is picked up during a game any additional weapons of the same type will count only as ammunition.

Each weapon has advantages and disadvantages when used against a given monster. Broadly speaking, however, the larger weapons do more damage but are harder to find and harder to keep stocked with ammunition. In each game, one or two weak weapons require no ammo and are therefore always available.

Doom games
No matter which weapon a player is wielding, their sprite (in multiplayer games, or source ports with a "chasecam" mode) is perpetually shown to be armed with the same generic as the former humans; a weapon similar to this, although presumably intended to be the chaingun, appears on the game's title screen.

Picking up a weapon plays the sound effect.

Early versions
Early alpha releases of Doom armed the player with a semi-automatic assault rifle, optionally equipped with a double-bladed as a melee weapon. This weapon was not included in the finished game. The rifle sprites revealed the player character to be wearing elbow pads, which can still be seen on the player character sprite along with the rifle itself. A few other weapons were also included in the alpha versions.

The Doom Bible mentions the Dark Claw and Unmaker that never made it to the finished game. The latter was reintroduced in Doom 64, and has an equivalent in Doom Eternal.

Doom

 * Fists: Basic melee with unlimited ammo, but only about as powerful as a pistol shot; normally used only as a last resort or with a berserk powerup.
 * Chainsaw: Damages like the normal fist, but four times faster.
 * Pistol: The default long-range weapon. The weakest weapon.
 * Shotgun: A good general-purpose weapon, especially at close range. Reload time is slightly longer than normal.
 * Chaingun: Good against large crowds, but its rapid rate of fire can quickly deplete its ammo.
 * Rocket launcher: Fires explosive projectiles. Does a lot of damage, but can also hurt the player if used at close range.
 * Plasma gun: Shoots projectiles of blue-hot plasma at high speed, which can take down groups of incoming enemies quickly.
 * BFG9000: The "Big Fucking Gun." Shoots a big green projectile at a cost of 40 cells, somewhat counter-intuitive to operate at first, but can kill any monster in one or two shots if all traces hit.

The chaingun and pistol both use the same ammo (bullets), so using either will also affect the other in ammo. The shotgun and super shotgun (see below) also share their ammo pool (shells) as do the plasma gun and BFG9000, which both use cells.

Doom II
All of the above weapons, with the addition of:
 * Super shotgun: A double-barrelled, sawed-off shotgun which takes 2 shells per shot, takes longer to reload, but at close range is deadlier than the regular shotgun.

Doom 64
All of the above weapons, with the addition of:
 * Unmaker: A demonic laser gun which is a hitscan version of the plasma gun at first but can be upgraded in firepower by the collection of Demon Keys.

Doom RPG
Doom RPG includes versions of the pistol, shotgun, super shotgun, chaingun, rocket launcher, plasma gun, and BFG-9000, as well as two new weapons, the fire axe and fire extinguisher.

Doom 3
All of Doom's weapons are present in some form in Doom 3, with the addition of:
 * Flashlight: Not a weapon per se, but it doubles as a crude club.
 * Machine gun: Similar to the chaingun, but not as powerful (but more accurate).
 * Grenades: Standard thrown fragmentation grenades on a timer.
 * Soul cube: Charged by the killing of monsters, and then released as a powerful seeking weapon that transfers health from the monster it hits to the player.

Resurrection of Evil
The Doom 3: Resurrection of Evil expansion pack contains all of Doom 3's weapons except the Soul Cube and the Chainsaw, but introduces a version of the gravity gun called the Grabber, and includes the double barrel shotgun (as in Doom II). It also introduces an artifact somewhat like the Soul Cube.

Doom II RPG
Doom II RPG includes weapons in the vein of Doom 3's (and its expansion pack, Resurrection of Evil) style of weaponry, along with some that are redesigned or completely new. This includes the chainsaw, assault rifle, scoped assault rifle, double barrel shotgun, chaingun, plasma gun, BFG, and the Soul Cube. The game introduces the holy water pistol, sentry bots (that either shoot or explode, with green being weaker and red being stronger), as well as toilets and sinks which can be picked up and thrown by the player character.

Doom (2016)
The 2016 Doom game contains all of the Doom II weapons and numerous additions. Some of the weapons are multiplayer-only. Additionally, the majority of weapons now feature weapon mods that add a choice of two secondary functions (which can be swapped out at will) to the weapon for greater tactical flexibility.

Campaign

 * BFG-9000
 * UAC EMG sidearm: The starting weapon for the player, replacing the original conventional pistol. It can be charged for a more powerful attack, but is very weak. However, it has infinite ammunition.
 * Chaingun
 * Chainsaw
 * Combat shotgun
 * Gauss cannon: A slow-firing weapon with high power and superior long-range accuracy.
 * Heavy assault rifle: An assault rifle taking the place of Doom 3's machine gun. It has upgrades for mini missiles and a scope.
 * Plasma rifle: A rapid-firing energy weapon whose shots have a small splash damage radius.
 * Rocket launcher
 * Super shotgun

Multiplayer

 * Burst rifle (also available in SnapMap)
 * Grenade launcher (added in the Bloodfall DLC)
 * Hellshot (also available in SnapMap)
 * Lightning gun (also available in SnapMap)
 * Reaper (added in the Hell Followed DLC)
 * Static cannon
 * EMG Mark V pistol (added in the Unto the Evil DLC; also available in SnapMap)
 * Vortex rifle (also available in SnapMap)

Doom Eternal
Doom Eternal contains many weapons that are largely similar to those in Doom (2016), along with two new weapons (one of which is similar to the Unmaker from Doom 64). A pistol was implemented into the game, but unobtainable outside of console commands.


 * Ballista: A beam type weapon that is effective at long range, similar to the Gauss Cannon.
 * BFG-9000: Functions the same as Doom (2016)'s counterpart, only consuming 30 BFG cells.
 * Chaingun
 * Chainsaw
 * Combat shotgun
 * Heavy cannon: Functions similarly to the heavy assault rifle.
 * Plasma rifle
 * Rocket launcher
 * Super shotgun: Now equipped with the "meat hook", a grappling hook mechanism that lets the user latch onto a demon and rapidly pull themselves towards for transportation and for setting up shots.
 * The Crucible: An Argent-powered energy sword that instantly kills normal hellspawn in one slash, but only carries three charges. Not to be confused of the demonic Crucible first seen in Doom (2016).
 * Unmaykr: A secret energy weapon that rapidly fires a spread of three energy bolts that can quickly tear through monsters. Six Empyrean Keys are required to unlock the weapon in the Fortress of Doom. Uses BFG cells.

The Ancient Gods, Part Two
In addition to all of the weapons (barring the Crucible), the expansion introduces the Sentinel Hammer, a powerful tool that falters surviving enemies and drops resources for the Slayer.

Doom (film)

 * See List of weapons in Doom (film).

Heretic

 * Staff
 * Gauntlets of the Necromancer
 * Elven Wand
 * Ethereal Crossbow
 * Dragon Claw
 * Hellstaff
 * Phoenix Rod
 * Firemace

Fighter

 * Spiked Gauntlets
 * Timon's Axe
 * Hammer of Retribution
 * Quietus

Cleric

 * Mace of Contrition
 * Serpent Staff
 * Firestorm
 * Wraithverge

Mage

 * Sapphire Wand
 * Frost Shards
 * Arc of Death
 * Bloodscourge

Strife

 * Punch Dagger
 * Crossbow
 * Assault Gun
 * Mini-Missile Launcher
 * Flamethrower
 * Grenade Launcher
 * Mauler
 * The Sigil of the One God

Hacx

 * Kick
 * Hoig Reznator
 * Pistol
 * Tazer
 * Cryogun
 * Uzi
 * Photon 'Zooka
 * Stick
 * Nuker

Chex Quest games

 * Bootspoon
 * Super bootspork
 * Mini-zorcher
 * Large zorcher
 * Rapid zorcher
 * Zorch propulsor
 * Phasing zorcher
 * LAZ (later called LAZ device)